When you say beach, are you talking about dry/wet sand or actually in the surf deeper then your knees?
I have both an Excal 1000 and 2 Sovereign GT's, both with the WOT coil, and one of which has been waterproofed. If your going to be deeper then your knees in the surf, you will have to be very careful or a Sov will become an expensive paperweight. If your only knee deep or less the Sov GT would be my suggestion, and is what I personally use.
The Excal 1000 is a fantastic beach detector, but there is just something about the Sov that makes it better to me. The tones are different, they are richer, a little more pronounced and it seems to be deeper. With that said, I still love and recommend the Excal 1000 which is why I still have one, I use to have 2 but sold one when I got my water proofed Sov. Added note, I sold the Excal for $75 less then what I paid for it when I bought it used approx 14 months earlier. THEY HOLD THEIR VALUE, especially if bought used. They are a little heavy for land use, but by using a harness (I highly recommend it) you would have no trouble on land.
I started off with my first Sov GT using it on the sand and up to my knees in the surf and fell in love with it. I found myself using the Sov GT more and more when I went to the beach and my Excal was used less, only using it when I was going deeper then my knees in the surf which you can't always do here due to the rough water. I spotted an Ad here on TN for a Sov GT a hunter had custom built to be waterproof and I jumped on it. My Excal hasn't been wet since I got the W.P. Sov GT.
Bottom line, if your going to be water hunting a lot, in the surf deeper then your knees, and can't find a custom water proofed Sov GT then go with the Excal. If your only going to be an occasional beach hunter and rarely deeper then your knees go for the Sov GT. It is a fantastic land and beach hunter up to your knees..
Detectors are like golf clubs, different choices for different situtations..........
These are only my opinions, I am not expert in any form. I am a water hunter, but still a newbie, I have only been hunting (addicted) for 21 months.