If all you're looking for is the basic sound and feel in a piano, I would recommend the F-90. We recently purchased the F90 and find it suitable for our (my son's) needs.
I know you might have the specs, but I'll reiterate some of the ones I remember:
1. F-90 has graded gravity based hammer action. Rolandus.com claims itís the same as their high-end pianos.
2. Has 10 instruments
3. Has a Layer feature - Can play two instruments at once and set the relative volume in 5 steps.
4. Built in Metronome with 5 volume levels. Beats of 0, 2 , 3, 4, 6 and adjustable Tempo.
6. Sustain Pedal included
7. 60 Demo Songs
8. Built-in Stand/Music stand
8. Keyboard Lock
9. Key Touch Sensitivity in 4 steps - Fixed, light, medium, heavy
1. Feature adjustments - Metronome Beat/Tempo adjustment, Demo Songs, metronome and layer Volumes, Key sensitivity, etc. are built into the piano Keys or voice keys. There are no visible indicators for these keys...one has to refer to the manual. Small Learning curve
2. No preference buttons - Cannot save one's preferences and the piano always resets to the default setting.
3. No ability to record..though you can hook up through MIDI
I'd like to mention that we were headed to pick up a Yamaha Clavinova CLP-150. On the way we stopped by Sam Ash Music to look at the portable Digital Pianos. My son and wife liked the sound of the Roland much more than the Yamaha portable digitals. We then headed to the Yamaha dealer, where they tried the CLP-150. They felt that the Roland had a more piano-like sound.
We spoke about it for a bit, and went with 'Plan B' - We decided to buy him an entry level piano and let him upgrade to a high-end in a few years - when he could make an educated, independent decision [If he were still interested!!]. 'Plan A' was to buy a decent digital piano that he would not outgrow in the next 6-8 years, if not longer.
Full Discloure: My son is only six, though he has been playing for the last 4 years. My wife is just a beginner and I do not play any instrument. Another contributing factor to purchasing the F-90 was the price. Sam Ash was running a clearance special for $699. This was for a brand new, in the box piece. The Clavinova CLP-150 was about $1500 more. If the F-90 cost its regular price of $1300-$1350, I would have bought the Clavinova.
To add to the serendipitous purchase was the fact that zzounds.com had this advertised on their website for $599. I went in the next day and got it price matched. That was another $100 off. I also got a "MidiSport Uno" MIDI connector with Cakewalk software - worth $40 thrown in for free.
All in all a good deal!! Best of Luck!!