It's acceptable for what you want to do.
Not knowing how much you're planning on spending for that system - or what your budget is - makes it hard to judge it's relative value.
Is this a refurbished or reconditioned HP system?
The 9500GT is at the shallow end of the pool in gaming video cards which you probably knew. It should play older games (the greatest) OK but will struggle with the more recent games (the latest).
To give you an idea where it stands in comparison check out the charts @ Guru3d
Here is THG's recent article: Best Graphics Cards For The Money: September '09