UMP eats people alive in CQC, if you land your shots that is. If you don't, and you get into a firefight with someone shooting 100 more rounds per minute than you, or more... you're toast. Still though, the UMP hits like a truck, situational. The MP7 is also a hip firing monster from what little time I've spent with it(going to spend more time with it soon). I don't use PDWs all that often, usually assault or carbines here but from the tiny bit I used it, I did NOT like the PP-2000 what so ever.
My Rig: ( A bit outdated ) ASUS P8P67 Deluxe MSI Nvidia GTX 660 Ti INTEL i7 2600K @ 4.6ghz 16GB G.SKILL Ripjawz 1866 DDR3 Windows 8.1 Professional Crucial MX100 256GB SSD Seagate 1.5TB 7200 HDD ASUS 24" 144hz monitor Razer Deathadder 2013 Razer Goliathus control pad Logitech G27 FFB Wheel Corsair H80i CPU cooler