I like the 2nd ones posted in the original thread. 19s will look great.
There's a guy on here with an 06 STX with a DJM 4/5 drop and he has 18s with no issues.
If you go 19s with maybe a 30 or 35 profile tire, you shouldn't have many, if any issues. The worst you might have to do is roll your fender lips or worry about rubbing at full lock.