The 148 is the best bang for your buck. That's what I got. However, there are different steppings, and before you install it make sure you get a good one. The three good ones are CAB2E, CABYE, and CABJE. The CAB2E is a beast for overclocking! Make sure you don't get the cabbage core (CABGE) because it is terrible for overclocking. It is on the chip itself, under the serial number. You'll recognize it.