First off, Mighty's WM 6.5/Sense 2.1 rom is final. he won't be updating that anymore unless there is a major change in the system. so you can trust that one is fine.
http://forum.ppcgeeks.com/showthread...13#post1581413
http://forum.ppcgeeks.com/showthread...78#post1581478
2nd, i've tried mightyrom war and it is hella fly, works well with the co0kie Home tab mod. The battery life is good as long as you don't update twitter too frequently.
but as far as a stock/similar to stock rom, try mighty's sense 2.1 you won't regret it. the wireless router data transfer is automatically blocked so you won't get any charges for tethering and it comes pretty bare, so u can add in w/e cabs you want. he does this because programs that come with the rom are in the windows folder, but files you add in with cabs are in the program files folder. this allows less clutter in the windows folder so faster program startups.