This would have been a great game for me in the nineties (or in the eighties when I lived on the south coast myself), as my uncle lived in Havant, and I used to stay over when we played Farnborough Town. In fact, his house was adjacent to their former ground at Front Lawn - they might have been Havant Town then, prior to their merger with Waterlooville - and I have seen a Sunday league game there, after they had moved out, when I stayed for a weekend and my uncle and auntie probably wanted me out of the house. Sadly, they had both died by 2001.
I have never been inside the current ground, which they have been able to develop as it's further away from any houses, although I have seen it from outside. However we have had a meeting, sort of, with Havant and Waterlooville before, as some of us took part in a quiz competition organised by Tony Williams of Team Talk magazine and the Non-League Directory in which we were drawn against them in 2004. Unfortunately, they beat us as I couldn't remember Nuneaton Borough's colours, and a ringer in our team thought that Moss Lane was the home ground of Macclesfield Town!
We obviously can't attend as Havant's in tier 4 (somebody had told me Waterlooville is in tier 2, which would be funny, but, apparently is incorrect), but this must be one of the ties of the round with both clubs in good form. Boston United v Chesterfield looks interesting too, although I have to wonder how seriously Chesterfield will take it.