It is a dilema
Sub £1000 keyboard options typically:-
Arranger - 61 keys synth type action, plenty of onboard styles and sounds Casio CT X5000, Yamaha PSR E473 (these are the best imo of the low cost arrangers), onboard amp and speakers
Digital piano - 73-88 keys with hammer action which varies in feel tremendously, limited onboard sounds, Korg D1, Yamaha P125, Roland FPX30, Kawai ES110, onboard amp and speakers
Arranger piano - 88 hammer action keybed with limted arranger features and less sounds than a full on arranger. Yamaha DGX670, Casio S3000, Korg XE20, onboard amp and speakers.
Workstation - 61-76-88 keys of differing action, 1000+ sounds, no onboard amp or speakers, Roland Juno DSm Korg Kross 2, Yamaha MODX
Of the models available Yamaha by far have the most variation starting from cr4p keyboards for kids moving up to the E series (mediocre sounds and a poor menu system but OK for learning the basics) and then there is the SX series of arrangers which are pretty good but you are talking £1000 for the SC 700 with the Korg PA 700 being the equivalent
As a beginner you probably have no idea which wa you are going, heck I have been playing keys for five years after transitioning from a guitar and I still do not know what I ultimately want (not true I do buy they do not yet make it).
I started with a Yamaha E series and hated it, it was rubbish, I cannot describe just how bad a keyboard it was. On a visit to my local Music Store they had a brand new model in the store it was so new there were only a handful in the Country. I walked out the door with one of the first Korg PA700 arrangers (as it happened it was their demo model which the Sales Guy should not have sold, he should have just taken an order) and so my love/hate relationship with Korg began. I played the PA700 back to back with a Yamaha S770/5 and it was then a no contest. It was quite a leap in cost, £1100 at the time and the learning curve was steep but I mastered it and everything could then be produced and set up very easily and quickly. When I took it to our Group sessions the others would be pushing buttons for an age on their Yamaha's, me press Songbook button > scroll to the required song > tap to select, all good and ready to play, ave time 3s.
I would now not buy a MIDI controller keyboard and I have bought and sold quite a few (low cost ones generally have rubbish keybeds and the better built ones are not much different in price to a workstation), and with Korg Kross 2 / Roland Juno DS etc workstations having MIDI connections it makes sense to me to buy one of these then you have the best of all worlds.
My journey through the keyboard world continues, I am starting to want an Arranger and a Digital piano and whilst I have a DP, it is time for a change to one with more onboard sounds and features.
I have a Yamaha P121 which will soon be consigned to eBay UK and hence I am considering a Kawai MP7SE or a Roland R88 (the Kawai has the edge thanks to MIDI in/out sockets). This would give me the 88 hammer action keys which I want to retain playing and then I can add an Arranger to my setup at some stage.
OK so based on this what do I suggest, well I cannot, all I can do is offer what I have been through and suggest options to you.
As an 88 key one size fits all but at a reasonable price then the Casio S3000 would be a pretty good choice but I stress for its price. Yes the Yamaha DGX 670 is probably the better overall unit but the small size and weight of the Casio wins if you want a keyboard that is easier to transport. The larger array of onboard sounds and arranger features blow the lesser S1000 away imo that is.
OR
A Roland Juno 76 or 88 would be a good workstation to consider and these would give onboard MIDI in/out sockets and the 76 keybed would be a good compromise.
