If you're looking for a good upgrade/1911 'carbine' GBB, I'd say go with a KJW. Much better mag capacity (single stack mag which double stacks the BBs, allowing for a 26rd capacity), holds enough gas for about 1.5x mags on average, and is compatible with 99% of the TM 1911 upgrade parts on the market today, so your possibilities are really only limited by your imagination. Not to mention, they are WAY more reliable than WEs, as most of the KJW 1911s come with Co2-capable cylinders, making them much more durable. Never had an issue with mine.
Anyways, you asked about upgrades, so my relevance in the above statement would be my suggestion of upgrading your base gun first, allowing for a much better and more durable platform in the long run.