Make sure your motherboard supports the processor, has a bios flash to support the Turion processors, or someone has created a modded bios for Turion processor support before you even consider buying it.
I have not heard a lot about the MT-37 model, but I have heard/read about the MT-40 being a solid overclocker. One advantage would be the 1MB of L2Cache compared to the 512KB you have now, and that wallet looks pretty sweet.
A standard socket 754 HSF would be fine for this processor. The processor is essential the same as Athlon 64's, but has the IHS removed/not installed. That is what your 3000+ would look like without the IHS.
Also with your motherboard make sure it has wide v-core options. Being a mobile processor designed to reduce energy consumption they run at lower voltage. I believe they are designed for 1.2 volts. There are people that have had great luck with the MT-40 and the MT-30. I believe Jrabb had a setup with a MT-30 at one time that broke the 3.0GHz barrier. I think it is worth a shot, and will likely overclock better then the Newcastle core you have.
I have not heard a lot about the MT-37 model, but I have heard/read about the MT-40 being a solid overclocker. One advantage would be the 1MB of L2Cache compared to the 512KB you have now, and that wallet looks pretty sweet.

A standard socket 754 HSF would be fine for this processor. The processor is essential the same as Athlon 64's, but has the IHS removed/not installed. That is what your 3000+ would look like without the IHS.
Also with your motherboard make sure it has wide v-core options. Being a mobile processor designed to reduce energy consumption they run at lower voltage. I believe they are designed for 1.2 volts. There are people that have had great luck with the MT-40 and the MT-30. I believe Jrabb had a setup with a MT-30 at one time that broke the 3.0GHz barrier. I think it is worth a shot, and will likely overclock better then the Newcastle core you have.