No need to get all mushy, lol! Be careful of using multiple textures when you can squeeze them all into one, it will drain performance! Remember, you can use up to 4096x4096 in texture size. That's very large and overkill for most objects. With your current 500X500 mostly solid color texture, you could fit 4 of them into 1 1024X1024 texture atlas. You could easily make each texture even smaller and squeeze 5 in there and still have a lot of detail for that pc. That would be much more efficient than 5 separate textures. Heck, a 512X512 would probably suffice. Remember to keep optimization in everything you do! Good luck!
I also want to reiterate that if you use just 1 texture, you can take advantage of normal and specular maps! Also, don't forget to reference the .x object in your .fpe file as opposed to the .dbo object.
Desktop: i7 4770@3.4Ghz, 12GB RAM, Win 10/64, GeForce GTX 1080, 1TB SSD, 1TB HDD; Laptop: i7 4800MQ@2.7Ghz, 16GB RAM, Win 10/64, GeForce GTX870M , 1TB SSD.