Can I make a couple suggestions? Buy fermenter buckets instead of carboys. They make just as good of beer and they are cheaper, safer, easier to handle, and they will stack if you don't want to have them full all the time.
The thing that made the most improvement in my beer was temperature control during fermentation. Find a way to keep the fermenter cool (low to mid 60's) for the first 4 or 5 days and your beer will turn out much better.
With the bug having bitten you so hard so quickly, you also should consider when you will switch to all grain brewing as the difference in price between grains and extract will make quite a difference in what you spend plus it will open up opportunities for even more varieties of beer.