choice of wheel size is limited.
plenty of 15s, very few 16s, tons of 17s and >.

if you are concerned with comfort and want to minimize $,
stick with 15, and buy some good tires.

the turanzas (LS model rated H min) are very good for the $ (about $100 less than MXV4$)

luke at tire rack (this forum sponsor) recommends them.
im very happy with mine in 205/55/16

you could do the turanzas in 15 for approx $500
new wheels and tires will be double that or more.