don't know much about the Inwin, but I have the Antec SX830 and it is great. it comes with 2 80mm fans, has slots for 2 more 80mm fans, and a 92mm fan just fits into the internal 3.5" drive bay for even more cooling power. also, it has the best 300w power supply in the business: the Antec 300w one...
I can heartily recommend the Antec SX830 over any other case that I've used. next best, the Enlight 7237.
edit: forgot to mention the easy access, no tools needed, latching side panel. very useful for those frequent case opening tweaking sessions.