It all depends on what type of cage you are looking for, really.
For rodents, I still like the solid sided containers, like glass aquariums. It is chew resistant and escape resistant for even the smallest of mice. It also is a lot more stable, less unlikely to be knocked over if its set on a solid surface.
I kept my very first colony of a 1:5 in a 20 gallon long, the most common aquarium utilized for corn snakes as well. It isn't as tall as most other aquariums, but its floor space is maximized for freedom of movement. If you have the space for it, I'd recommend that. I've comfortably kept a 1:8 in such an enclosure quite comfortably. Mice seem to do better when they are in a slightly crowded environment, at least that is my own observation. They're highly gregarious and enjoy the company and cuddling of one another.
But however, with the restricted air-flow in a 4 sided enclosure, the need for frequent cleanings is always there. It doesn't allow the urine to dry as fast as an open sided enclosure, and it can exacerbate an already smelly group of animals if not regularly cleaned.
Your other option is a wire cage, which I've used with rats with great success. I bought my rat cage from
Martin's Cages, and I love it. It currently houses my ferret rather comfortably once I got rid of my rats. Its easy to clean, and just convenient all the way around.
However, finding a maker of mouse wire cages could be a daunting task. Mice are notorious escape artists, and anything in which their head can fit through, the rest of their body can squeeze through as well. And this is really apparent in the younger mice, they're quick and still small enough that wire is of no hindrance to them. Mice are also very good climbers, and if any door is left unlatched, they may be able to escape. The wire cages from any petshop are hugely inadequate for mice. They utilize vertical or horizontal wires, where most of the better made cages are squared wires which is more difficult for escape.
On the plus side, wire cages allow for optimum ventilation, which prevents the accumulation of ammonia from their urine (that can cause health issues in long exposures). However, I can only imagine the sticky stench a male mouse with a knack for climbing and urinating on the sides of the cage would cause. One thing I am glad for my rack system nowadays, no more sticky urine soaked water bottles.
Just shop around and see what you like. Its all about experimentation. =)