Many of the options above are great and have decent prices. If getting out an about very often isn't an issue and you spend most of your time around home (which I don't want to assume you do) I have one more (and cheaper) option. 5v passthrough I just received mine a couple weeks ago and it definitely kicks harder than my RIVA. You'll want a 5v/2amp wall wart. I got mine on ebay way cheaper than anywhere else I saw with free shipping. Just do a couple searches or pm if you want the seller. The two together cost me about $22 and you won't need batteries and chargers and all that to go along. Just atties/cartos and liquid.
Honestly, I don't know if that's your problem but it's up to you to try what you want to solve the issues you are running into. I know that I tend to be great for a few weeks with my setup and then things just don't feel like they are going as great as before. Most of the time I just try to plow through as I don't have a ton of money to drop on something new all the time either and things seem to get better again after a little bit, especially if I stop tinkering with stuff trying to figure out what's going on.
I read through most of the posts previous to mine. Some were TL
R so if someone has suggested this already my apologies and just read this as a +1 
Honestly, I don't know if that's your problem but it's up to you to try what you want to solve the issues you are running into. I know that I tend to be great for a few weeks with my setup and then things just don't feel like they are going as great as before. Most of the time I just try to plow through as I don't have a ton of money to drop on something new all the time either and things seem to get better again after a little bit, especially if I stop tinkering with stuff trying to figure out what's going on.
I read through most of the posts previous to mine. Some were TL