Just picked up a eberlestock pack- the "Halftrack" edition.
Pictures to follow, but if your an echo toting either of these radios around, this IS the backpack for you for 1-2 day missions (would replace a standard 3 day pack). It contains an inner shelf that the radio can sit on, and straps that hold the radio in. Various (and I mean alot) of inner pockets, the lowest two perfect size for two 5590's. On either side of the bag there are pouches perfect for 100 OZ camelbacks, or just GREAT for 2040 antenna (I opt for 2055) I added a blackhawk drop pouch on the left waist belt for my 2055 (it enables me along with my remote data cable for the psc-5 to do satcom without taking my backpack off- all I have to do is pull the 2055 out and extend (transmission line already connected to psc-5 and antenna) put it on az and ele, switch my headset to the psc-5 PTT, and I am on the bird. Takes approx 25 seconds compared to about 2-3 minutes with a regular rucksack or other go bags without this easy access.
Going where I am going I am truely happy with this purchase.
Notes: When ordering the half track with the use of the PSC-5 you must email Glen Eberle and ask him to adjust the inner straps to meet the length of the PSC-5. Glen is the designer of the bags and WILL make changes to your bag if you say pretty please
Really though, they are a solid company and I am very impressed with the quality of material and specialized focus on the needs of the operator instead of the need to sell a plain tactical bag.
You can find it at
http://eberlestock.com/Halftrack%20Backpack.htm
(On another equipment note, the V-tac m4 2 point sling is the best out there hands down. Just went through sfauc and I will suggest buying one now.)