Well, here in Germany you can´t find any shop that sells the red Momo since 2003 I think.
So ebay or import is the only way to get one...
I was lucky to get a red one on ebay (I usually never buy there) right after another one got away for 235€ ...
Maybe nobody noticed the other one and I got it for 151€ plus some postal fee.
Very cheap in comparison.
I wish they would still sell it in stores or even online-shops
Try to install a clean Windows on a different partition if possible.
Then the latest drivers and a NEW (!!) LFS without your old configs.
If this works as slow as your current sys you can be sure it´s a hardware problem.
But I´d say it´s driver or OS related, so try to install a test system if possible.