I'm a big fan of 1x4x scopes as well. The one I have is a lot heavier than my red dots. However I think it's far more versatile and just about as fast as a red dot at close range.
If you go with a 1x4, and you figure on using it with both eyes open, then absolutely go for as close to a true 1x as possible. Even a little bit over that 1X mark and it can mess with your binocular vision a lot. You need real adaptive eyes to use even a 1.1X with the same speed as a red dot.
I also have a SPARC and a Bushnell TRS25 and they are great, inexpensive optics. The SPARC has had the crap kicked out of it for four or five years now and it's never missed a beat. I think it has two downsides. First, it's large for a red dot and using a both eyes open sighting, I think it slightly obscures left side vision. Second, it takes an odd sized battery that I can't find locally.
The TRS25 is a new addition and it's nice and it's small, but I don't know about it's durability yet.
You can turn the brightness up a lot on both and the dot does get bigger as it gets brighter, and a bit fuzzier too. No problems viewing either in bright sun.