There are many ISPs offering leased line - Entanet is just one, and sadly, I've found them to be on the expensive side of things.
However, a good quick quote can be found in the AAISP site:
that's always good as a benchmark.
Oether technology is EFM - and someone I looked at recently gave good numbers -
But do remember that with a leased line you're connection contention should be 1:1 from your premises right to the edge of the ISPs network and it's symetrical and usually does not come with any sort of data cap. (But these are important questions to ask the ISP!) Ping times should be a lot less over a leased line too - 1-2ms for fibre, possibly more for EFM which is delivered on copper.