Sentras are amazing machines believe it or not.. I think Nissan got it right.
My dad's b13 sentra has been modified to rev to over 8000rpm, it has a straight pipe, timing INSANELY advanced, & what not.
This car has 300,000 kilometers (he owned it since new), it has been jumped (literally) duke of hazard's style twice, every year it goes through a dozen 8 hour trips through the south american andes mountains.. revving the [censored] out of it, gets drifted, off-roaded, mudded with the big boys, driven through salt water, it has been abused like you would not imagine. Heck.. it was supposebly totalled TWICE, but we shelled out the money to repair this trusty happy car, and it still starts everyday happy to do it again and looks amazing for a B13:
I have a 2004 SE-R Spec-V.. amazing car as well. But before this I had a 2002 GXE (same engine as yours).. and it went through 150k miles of abuse before I sold it. It still had perfect compression, vaccum, everything was in excellent condition and ready to keep going. But I had to make room for the Spec-V:
My old GXE before I sold it for over KBB:
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I'm a subaru guy, but sentras will always have a place in my garage and their right to my wallet. I have got FOUR of my friends hooked on modifiying Sentras and they all love it and even if they move to a different car, they still come back to either a subaru or a sentra.. HAHA!