Is it advisable to mix and match shocks and struts?

I have a full set of Koni Yellows, but I think that maybe overkill for me. Might sell them.

I still need some though, and I have 2 Koni Red shocks. Could I install these 2 Reds and a couple of KYB GR-2 struts in front? Or should I be keeping the front and back the same?

The Koni Reds I have are #1246 which are the ones listed for cars with 15" wheels. The 1265 are the ones for 16" wheels (which is what I have). Knowing that, is it recommended that I install these Reds in the back and KYB in front? Or should I just buy a full set of KYB? Or should I just install my full set of Yellows?

I'm kinda broke right now (bought the Yellows a long time ago) and the car needs lots of work. I figure I can sell the Yellows and with the money I can get something else decent and have money left over.

Thoughts?

Thanks.