@carey1110 i recently upgraded to the 7.5 III from an ARC REF40. The former is far more linear, open, uncoloured and more solid state like than the ARC. The REF40 sounds “nicer” but that means it imparts a lovely tinge of space and air to everything, making the recording sound realer than real. Thus I assume that if you are already accustomed to a solid state sound with your Rowland then you should find the VTL a good fit and not give anything up in terms of transparency and bass control. In my instance I found the VTL provided deeper bass, but less pronounced than the ARC.
By the way if you buy from a VTL dealer then you should have no issues with service. I have owned their gear for over ten years and have lots of positive service experiences (all occasioned by decisions I made or problems I caused, these amps are very reliable). Buying used outside the dealer network may be another matter however ...