The Kramer is a Naniwa Chocera.....not what I would consider a "value" stone per say. It's a really good stone....priced accordingly.
Mark's recommendation for the 5pc set might very well be your best option as it provides a couple of things I'd like to see every newbie sharpener have.
The stone's it includes are very good and one's I still use today.
However, your current set up is a bit peculiar to be honest and not something I'd necessarily want to have even though they are both very good stone's. The 2k and 3k are too close in grit to be worth having both. As Steve rather eluded, you could really skip one of them fairly easily. Though, both are very nice stone's.....maybe use one once and one the other time?!?!?