thats a lot of red devils, my advise, having a 125g myself, get at least a 180 I keep pbass and large cats and if you want to do that its better to have that extra depth, and well worth a couple extra dollars
a few pics from my 180 cant git a full tank shot because of the limited space its in but if you want to be happy go for the 240 if you can i have two 285's but no fish in them yet.
here is my 180.... I like the size, gives you a lot of options. The only thing i would look into before purchase is your foundation. After filling mine, if you walked close to it, it would shake a little.....very scary. I had to go under the house and put some support under it to minimize floor movement..... Running 2 Rena FX3's, 3 200watt heaters and am looking into air pumps to add some oxgen to the water.