Considering R22 AC myself
A Trane dealer says when the R22 outdoor condensor (compressor) wears out (No R22 units after 2010), he does NOT recommend indoor coil (evaporator) be flushed & reused with R410a condensor. A commercial HVAC tech said it's ok (maybe depends on indoor coil type???). 3rdgenhvac's remarks (410 higher pressure etc) is one more reason I am leaning towards a Trane R22 (1.5 or 2 ton XB13). The Copeland website says 2 million scrolls sold. I'm sure they are good (quiet too). But, it reinforces R410a hasn't been around as long, like cde72's comments about "R410a questionable history of reliability". I hope to have a system with NO leaks and not need recharge (impossible?). Do you really plan to be in your condo 15 years from now?
R22 Linesets Not For 410a Per This Link
If you want to read more about your question about R22 linesets and whether to re-use with 410a, check out this thread. I stumbled on it while searching on HSPF.
The R22 / 410a lineset part starts on page 2 of the thread: