All the Fine Molds SW kits are excellent - much better than the old AMT kits.
I also like the grey you used. Dark enough not to be white but not so dark that you can't see the contrast of the solar panels. Standard TIE should be a little more white. Display stand needs a shot of flat black.
The X-Wing and Y-Wing are a lot more flexible in how you want to finish them. X can be done up as one of four different ships - Luke, Wedge, Biggs and Red Leader - and Y has 3 different schemes - Golds Leader, 2 and 3.