you overpaid quite a bit actually. If you're happy, thats all that matters, but you DID overpay.
$1000 could have gotten you a Centrino, which is faster. Don't let the Celeron clock speed fool you, the 1.5 Pentium M would have been a much better CPU, and your battery life would have been MUCH better.
That said, my dad has a 2.6 Celeron Inspiron 1150, and its a decent enough laptop. However, he only paid $700 for his, with better options.