My son is on a 26" XS Santa Cruz Julianna. Looking to move him up. He has ridden small 29 HT's and fits well. I believe I can put a HT 29er together for a reasonable price, but sort of like the idea of finding a small Santa Cruz Superlight and converting it to a 27.5. Recreational XC and some XC racing... 1x10... want to put the money in the wheels. Any advice?