Where will it be used in emergencies? The issue is the cold, of course. Depending on where you are in Texas, that could be mild to severe. It's easier to kick off a bag that's too warm than to make a light bag warm. (Space blankets work, though.)

Same with the new tent: what's your worst weather? How many people sleep in it? Do you need for it to hold gear, too? How often will you use it? Are you going to hike with it? Car camp? Use it as emergency shelter if your home is destroyed?

My general answer is that if it's not something you're going to use often, you need to decide between a cheap piece of crap that will get you by or a decent bag and tent that will stand up to severe use. If you buy cheap, buy a couple for back ups, and live with the results. Sounds like you've done the cheap route with tents, so post what your needs are and see what answers you get.