I guess this is the only spot i can ask around about bag...

My current bag is a shoulder bag: Lowepro Rezo 180AW type

Recently been looking around for a replacement, a backpack type, which for convenience of mobility during travel.

the criteria fits for the bag is:
1) has easy access, a side zip which can open faster to access the SLR with grip attached. To be precise, its a D90

2) i would only carry a zoom(likely attached to the SLR), a prime, a flashgun, batteries, memory cards, chargers. considering it is for travel use, i tot of having a laptop compartment (not plan to carry laptop, but ipad instead), also weather cover (i like d AW design of lowerpro)

3) aware of 3 types of access for camera bag, other than usual front access, there r side access and back access also. side access has limitation for big size SLR or with grip, hence wonder any side access bag good enough, also back access is more secure. I don prefer a bag with jz front access, especially when travel carrying at back.

as i din spot any ideal size and price point from lowepro, i m given it up n open to other brands... but clueless of what is out there...
therefore hoping to get some suggestion what can be get out there...
preferably price around 300 or below...
Thx for any advice...

Checking... Thanks!!

Any other brand to recommend?