I recently bought a horizontal borer. Did look at this one initially;
http://www.timdixon.com/mills-and-borers.htm The guy is very helpful and knows his stuff.
These Kearns S types machines are about the smallest borers made and have a good reputation. But in the end went for a much bigger 80mm Pegard (nearly 9 tonnes) with a full powered rotary table which alllows it to also be used for rotary milling and even as a vertical lathe.
Nick