Yeah Starward is amazing for the money. I have taken a few bottles of the Wine Cask overseas for business gifts and they are always very well received, and I get requests for more! The Solera bottling is quite hard to find and reaches into the $200's but if you like the wine cask & standard Sherry bottlings then it's worth finding. I have seen it in multiple whisky bars both locally and in NZ.
I have Black Gate myself, and I think another member has too (maybe run a search). I got a bottle of their BG004 via The Oak Barrel which is quite sweet with some spice, and have tasted the BG021/022 which is deep and rich but not as spicy as the 004. The port casks have a quite different interaction with the spirit and while you can detect distillery character it is quite a different dram. I'd love to get my hands on a 'juiced' port cask maturation of 5-6 years, it would almost be a 'dessert dram'.
Next purchase with be their 620s (ie 6x 20L casks blended) release, and possibly the BG011 for a cask strength. Black Gate is an underrated producer, as is Iniquity. Both are very worthy of your cash.
I will also throw out Baker Williams, which is from my home town. I only know the people in passing, but they are doing 500ml for $130ish. The initial release was a 3-year maturation and they have a few casks still going which I was told they would try to get to 5 years. The temperature delta through the year is very high and everything matures faster out there, Mudgee has had as low as -8 this winter, and a 43 degree day last summer. The spirit expands in and out of the wood far more with this, so 5 years is closer to 12-15 years in Tasmania or Scotland.