ye sound like you want good run time, so if you dont want to spend bid bux but still want good batteries i would recomend intellect 3300 or 3600. you can get em from
www.rcstation.com for around $19 US for the 3300's and about $23 for 3600's. they come loose so you will have to have them assembled by someone, or if you are ok with a soldering iron you can do it yourself. you can also purchase pre made stick packs whick are good for bashing around, but not really race quality. these cells are not "matched" but as a begginer you probably wont benifet from matched packs anyway.
hope this helps.