Try the NAD PP-2. It is very cheap and very good. I am using one now. You can get it for 129 dollars brand new from audioadvisor.com. It can be used with mc or mm cartridges and has plenty of gain. For the money u cant beat it. Its very quiet as well. I use it with my Naim Nait 5i and its very detailed. I think it will work with your sumiko cartridge.
Shay
Shay