Just wanted to add, since you said that you started out with Mr. Beer, that the Mr. Beer LBK is an ideal fermenter for doing 2.5 gallon batches of All Grain, BIAB, brews. Handy if, like me, you only have a 5 gallon brew kettle.
And All grain (especially the BIAB method RM-MN suggests) isn't as difficult as you inevitably think, prior to trying. Was definitely intimidated, myself, by the thought of maintaining an exact mash temp for an hour, or more, calculating volumes of water needed, strike temp etc. Etc. It can be done in a very un-empirical manner and still turn out decent beer or you can pay attention to every single detail and, maybe, turn out some outstanding beer. As mentioned by others, above, if you have the processes of sufficient wort aeration/yeast pitching rates and fermentation temperature control you'll make great beer whether you do extract or all grain