I used to use Plus-X, when it went away, I tried Delta100, T-max 100. They were OK but I liked Plus-X better. I then tried HP4+ and felt I was back home. I used to process in HC-110, but several years ago switched to Xtol. HP4+ in Xtol has been my working combination now for a long time. I could get very good results with T-Max and Delta but found they were not as forgiving. HP4+ exposure a bit off, no issue, development a bit wrong, no issue. Get them both off in the wrong direction, maybe a flat negative. Does not happen very often. It's not that it was difficult to get good results from T-max or Delta, but I find HP4+ easier and I like the look better.