I use PSP X 10 and its not that much better then Paint.Net, just more whistles and bells.

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Asrock PGV, P 4 CPU 2.80GHz Ocd to 3GHz
Ballistix 2GB 2048MB Kit
GeForce 6600 GT Ocd 8% zalman VF700 Cooler
Sony 19" X-Black Technology LCD DVI
Logitech G15 Gaming Keyboaed