I haven't got as far as a solar panel yet but I did start on a 'portable USB power' project.
It's a bit more modular than the all in one packs that have been set up here and I pilfered an idea here and there, but I think it'll work very well for me.
The thing I didn't like about the goal zero was the specs on the Guide 10 as a battery pack weren't great, you only get 2000mAh at 5V out of the 4 2000mAh batteries. Lithium Ion batteries have way more power for the weight so I set off in search of a USB rechargeable battery pack and found this which I paired with an eneloop USB charger:
5000mAh and I bought two very similar ones so I have a total of 10000mAh in a pretty small package. This will allow me to hook the depleted one up to a solar panel or other USB power source to charge while the charged one charges some batteries, cellphone, iPad or whatever. I'm still contemplating the Nomad 7 panel since it seems to have the best stats for the price but I noticed that Coleman has a very similar panel for about half the price. I'm going to try to snag one of those first which will put the total bill for my Panel, both battery packs and the eneloop charger at about $130. Which is still considerably less than the $160ish that a Guide10+ adventure kit would cost me after shipping.
Decided to check the store that carries the Coleman panels at lunch and they had one left. So much for calling me when they came in
At first glance it's VERY similar to the Goal Zero one. same outputs, same wattage. But it looks like slightly cheaper materials in the build process. I'll test it out this weekend at the lake and see how it goes.
So as of 10 mins ago I suppose I no longer need a recommendation
All prices are Canadian $$
7.5w solar panel $50
2x 5000mAh battery packs ~$50
Eneloop USB charger with 2 AA Eneloops $18
Shipping for battery packs and eneloop charger ~$10
All in for about $130 plus tax and I have a system that has double the capacity of the Orange Joos at a little over half the cost and equivalent solar capacity and 5 times the battery pack capacity of the Guide 10+ adventure kit at 2/3 the cost. Can't say i'm disappointed with that.