you know, 2.26Ghz is nice and fast. i have an athlon XP 2800+ (thoroughbred core) 2.25Ghz. and 1GB pc3200 RAM...although it's running at 333mhz dual channel cause my FSB is at 333 and the Proc doesnt want me to drop the multiplier and boost the fsb to get the ram to 400mhz.
anyhow. i have an ASUS A7N8X-E Deluxe....a fantastic Socket A motherboard for $60.
i build high end computers and take it from me. you will see a MUCH greater increase from running SATA RAID (2 hard drives in parallel) than you wouuld with a faster processor and MB.
you need to get an MB with an onboard SATA RAID controller (preferably Silicone Image (SiI) or HighPoint) or buy one off the shelf and jam it into you PCI slot. then go out and buy two Western Digital 36GB raptor drives (WD360GD). (100 each online)
each drive is 10,000 RPM and can has 5.4ms seek times, as opposed to your 1 7200rpm IDE drive that has 8.9ms seek times. now multiply that new drive x 2 for the RAID and you get the following:
the controller and the 2 drives will run you about 300 together. and will give you a computer that will blow away anything that runs at 3.6GHz and on a 7200rpm drive.
also the video card will make a huge difference in performance in graphics speeds, not a different CPU.
you have plenty of RAM, and it's plenty fast. your CPU is excellent. but your video card can be boosted. and your hard drives are really what's holding back the speed because of the slow seek times and the very slow transfer rates. think about it, most of the time you spend waiting, it's for your hard drive to load all the info into your RAM.
the only time you ever need a faster CPU is if you are doing anything in the RAM that requires intense math calculations. like video editing, graphics editing, movie encoding, or giant arithmatic calculations.
take it from me, unless you do really processor intensive things, you wont see much of a difference without changing out your video or drives first.
Leon