if u need to save money go for 22inch. as saintsinner said 24 inch is full hd. but full hd means greater strain on system while playing games on native resolution. also i dont think there is much difference btw 22 and 24 inch. also look at 21 inch benq full hd cost 13000rs found in techtree or so. ask other about these to confirm. main purpose of ups is to save ur work and shut down. so get a ups for 2000rs or so rating some 600w or v, check those difference btw watt and v. i own z5500 its too much for average sized room though bass is a bit tighter. dont know about those 2 u mentioned. even my older creative 5.1 is doing a good job(rs.4300 3yrs back).