I have a sugo I know it in and out, what CPU are you using?, an AMD X2?, whatever you do,do not get an Nforce 6150 chipset board they are tripe, too many problems..the X1800XT will fit just remove the top DVI connector before you Install it then once installed screw it back on, just need a pair of pliers to screw it off, cooling wise is hard, the X2 does not run that hot, so you can use the stock cooler and a PSU which does not have a fan at the bottom, as it will steal airflow from the cooler so a PSU with a fan at front and back will work with stock cooler, but you will get loads of excess cables, which are a pain to hide..., but you can do it if you are patient, my advice would be to get a modular PSU with a fan on the bottom like an Enermax Liberty and then get the silverstone NT06 cooler, it's a passive cooler designed for the SUGO, uses the PSU fan to extract warm air from it, people with X2's have reported Temps under 55 degrees at full load, so your choice really...I have a link to the NT06 articles if you email me I will send...