Hi Neil,
I think that a good No 4 or 4 1/2 is a good place to start. Mine have served me well. You could go for either a Record or a Stanley, though I am biased towards the Stanleys. I look for rosewood handles if possible which means buying something older. Make sure there are no cracks in the rear handle. I also recommend the wider No 4 1/2 unless you are small handed or and small in stature in which case go for the smaller size and grow into the larger. People often talk about the close tolerance of engineered threads on some other finely engineered planes being made, meaning that there is much less whiplash between advancing and withdrawing the protruding blade, but in reality I find I can spin my adjustment knob forwards and backwards and take up any slack in one twist.
Woodworking is about finding the balance between what modern methods have to offer without throwing out what was common craftsmanship in the days before they were invented and developed. It's all too easy to let the machine dominate and control or even dictate a design because of the limitations that they impose and so render sterile many of today's designs. I excitedly suggest that you discover for yourself exactly what the old craftsmen had. Some of the finest work ever produced throughout history was produced in the pre-machine age and serve as examples for us to learn from and admire and aspire to today.
You said that you had an Anant, I think. Though these plane makers in India have always had a lowly reputation and poor levels of quality when it comes to hand planes, the planes can be fettled like any other. If you do have one, then it's probably a number 4. if that's the case I suggest you try for both the number 4 1/2 and 5 1/2. I have found these wider planes give better balance, and the extra width, though seemingly marginal, is of great benefit. The Faithfull should work fine but the downside of Faithfull tools is that they don't always give you the feeling of heirloom tools.
I have bought several 4 1/2's and 5 1/2's on Ebay for around £10 to £15. Shipping sometimes inflates this price but when you think that a good old plane will last another hundred years, it's a small investment.
If I were to recommend your next bench-type plane I wood go for a bevel-up low-angle Veritas. if you go on line, I wrote an article a couple of years ago about shooting boards. I used the Veritas planes to illustrate both the value of the cutting boards and also the low angle planes. You can download the whole article for from
here.
Sincerely for now,
Paul Sellers