Wonder Years has the autographed version as well for even more ($300). The regular version for ($250) is the standardized complete set. Going to blu-ray isn't going to change TL's model any. And in this case, I believe I heard Wonder Years was edited in standard definition to give it its look, so I doubt a blu-ray version would add much. So pay $250 or wait and get the individual seasons for around $120, or go with out. It's your choice.
Personally, i will be happy with the standard individual seasons for less money and will enjoy the series. For China Beach i went for the complete series because i wanted the extra disk content, and the packaging was normal.