OK I know everyone will raise a fuss (maybe) and I know the pack is suposoed to be the last item purchased but if you know all the gear you are going to purchse, does it really matter? Let me start by listing the main gear I will be bringing.

Thermarest Ridgerest Duluxe Regular pad
REI Sahara 30^ bag regular
Marmot Limilight 2p tent
I am going to pick up a stuff sack for clothes
I am going to pick up a small bear canister
I also want to get a few esentiails (burner, water filter etc) but most of my firends already have that stuff adn they go with me.

The types of hikes I will go on are no more then 5 days but typically 2-4, On Thru hikes. Mostly in the Sierra Nevada and Utah.

Now my issue, I am having a hard time deciding between packs? I am considering the following:
$170 REI Flash 65 http://www.rei.com/product/778468
$155 TNF El Lobo (65) http://www.rei.com/product/803917
$120 TNF Terra 65 http://www.rei.com/product/795972
$109 High Sierra Sentinal 65 http://www.rei.com/product/760600

I was going to shy away from the REI only because my friend has it and it does not have a seperate / bottom sleeping bag compartment. The Terra does not have bottom straps but looks to be the most comfortable. The HS is the cheapest but I am not so confidante about the brand. Also both TNF seem to be short on pockets.

Any help is much apprecaited. I hope I was clear and direct.
Thanks,

Oh and I have been on plenty of camping trips and long days hikes but just a few backpacking trips. I do love it but I have never had the hiking partners to do it with.