I am currently sub-shopping for my birthday (early July), and have my eyes set on a pair of 187's. I have a few questions. 1. Is a port tuned to 45hz too high? I have zero experience with box building and found a fairly cheap prefab tuned to such (lol don't bash me too much) 2. Can these take 500rms daily? 3. I was gonna buy mine off of some site called Vertex.com, I was wondering if anybody had any experience with them? 4. I had my heart set on two RF P3's (lol again, don't bash me too much). I noticed they have a larger voice coil than 187's. Should this be a concern? 5. Last one, I promise. How toughly built are these subs? Cuz I live in Texas and it gets HOT, and I don't want any thing goin wrong b/c of it. What's the best way to protect a sub? Thanks in advance for any answers.