I know that computer so well - my parents still run one of 'em as their main desktop.
This is despite my dad having a 3Ghz i5 hooked up to his big-screen plasma, and my mom having a 2.8 Ghz quad-core i3 hooked up to a 42" CRT in the den for watching yoga youtube videos that also does her Wii Fit - they only just want that computer!
I brought that computer home for my parents after their old hand-me-down died many years ago.
After a few years of happy usage, one of it's large capacitors grenaded and destroyed the mobo. (this was a common occurrence for a few years with many desktops - faulty caps from Taiwan).
They loved it so much, and even 4 years ago it was only $30 shipped to have the exact same computer shipped here. There was no question about using the superior computers running windows 7 on bigger screens - just make that mini PC tower work again with all their settings (yeah, I had already duplicated all of the settings and files into their bigscreen modern video playing computers and update them every 6 months so they have backups - those are for TV...).
They are still running it. They love the hyper threading - it's so futuristic.
It's running XP Performance Edition (IE downgraded to V6 and all nonessential functions disabled - 300m ISO loadable from USB) - PM for details - it makes this computer run snappy!
I believe it will run SSF at full speed (Performance/FPS) given the ram upgrade (I ran it decently on much less back in the day). Gameplay should be nearly perfect too. The hard-drive will certainly be able to maintain the CDROM speed while loading.
The only problem with the computer is that truly demanding processes test the hyperthreading virtual dual-core the cpu claims to have. In a browser, when the amount of memory is low, and you have a SWF or HTML5 (youtube) video playing, it will not function well. Similarly, SWF games can be painful.
Its integrated graphics card can be tweaked using some intel labs utils if you wish to interface native emulator resolutions to an external CRT.
I believe that given the right tweaks, you can make that computer output an RGB signal to a CRT (monitor?) to have nearly the same experience someone with a Saturn and a Rhea SD iso loader does.
If you wish to mess around with the onboard intel video, Let me know and I'll dig up the links for the utilities.
Further, some (much more expensive than the computer) decently cheap hardware can transcode that tweaked native RGB resolution video from the intel onboard video card into Component 240p video and you can plug it into a CRT television.
You made a good purchase! Cheers!