I like low-powered SET amps (I own one), but, even though they are usually very simple amps, they require special, and somewhat expensive, output transformers. The decent sounding ones don't come cheap.
If you are interested in what SET amps can do, go to a retailer or an audio show and listen first before shopping. To some extent, the touted "magic" is an exaggeration--good SET amps sound great, but, that is also the case with good pushpull and output transformerless ((ORL) amps. If you like your current speakers, but you are looking for something different to spice things up, consider an OTL amp. OTL's are very vivid and lively sounding and will be a bigger change in sound from your Jolida than any SEt amp would be.